{
  "cveId": "CVE-2023-28321",
  "url": "https://patchblox.com/security/cve/CVE-2023-28321",
  "summary": "CVE-2023-28321 is fixed in 15 products on 1 platform, first by curl 7.58.0-2ubuntu3.24\u002Besm1, released May 16, 2023. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "curl: An improper certificate validation vulnerability exists in curl \u003Cv8.1.0 inthe way it supports matching of wildcard pa...",
  "description": "An improper certificate validation vulnerability exists in curl \u003Cv8.1.0 inthe way it supports matching of wildcard patterns when listed as \u0022SubjectAlternative Name\u0022 in TLS server certificates. curl can be built to use itsown name matching function for TLS rather than one provided by a TLSlibrary. This private wildcard matching function would match IDN(International Domain Name) hosts incorrectly and could as a result acceptpatterns that otherwise should mismatch. IDN hostnames are converted topuny code before used for certificate checks. Puny coded names always startwith \u0060xn--\u0060 and should not be allowed to pattern match, but the wildcardcheck in curl could still check for \u0060x*\u0060, which would match even though theIDN name most likely contained nothing even resembling an \u0060x\u0060.",
  "published": "2023-05-16T23:00:00Z",
  "severity": "Low",
  "cvss": 5.9,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
  "epss": 0.01806,
  "epssPercentile": 0.78723,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "curl",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "7.88.1-10",
      "fix": "DEBIAN-CVE-2023-28321",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-28321",
      "released": "2023-05-26T21:15:16Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "7.88.1-10",
      "fix": "DEBIAN-CVE-2023-28321",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-28321",
      "released": "2023-05-26T21:15:16Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "Debian 14",
      "fixedVersion": "7.88.1-10",
      "fix": "DEBIAN-CVE-2023-28321",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-28321",
      "released": "2023-05-26T21:15:16Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "RHEL 8",
      "fixedVersion": "0:7.61.1-30.el8_8.3",
      "fix": "RHSA-2023:4523",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2023-4523",
      "released": "2023-08-08T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "RHEL 9",
      "fixedVersion": "0:7.76.1-23.el9_2.2",
      "fix": "RHSA-2023:4354",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2023-4354",
      "released": "2023-08-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "7.58.0-2ubuntu3.24\u002Besm1",
      "fix": "curl 7.58.0-2ubuntu3.24\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-curl-7.58.0-2ubuntu3.24-esm1",
      "released": "2023-05-16T23:00:00Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "7.68.0-1ubuntu2.19",
      "fix": "curl 7.68.0-1ubuntu2.19",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-curl-7.68.0-1ubuntu2.19",
      "released": "2023-05-16T23:00:00Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "7.81.0-1ubuntu1.11",
      "fix": "curl 7.81.0-1ubuntu1.11",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-curl-7.81.0-1ubuntu1.11",
      "released": "2023-05-16T23:00:00Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "Ubuntu 24.10 (oracular)",
      "fixedVersion": "7.88.1-10ubuntu1",
      "fix": "curl 7.88.1-10ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-oracular-curl-7.88.1-10ubuntu1",
      "released": "2026-01-16T01:42:23Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "Ubuntu 25.04 (plucky)",
      "fixedVersion": "7.88.1-10ubuntu1",
      "fix": "curl 7.88.1-10ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-plucky-curl-7.88.1-10ubuntu1",
      "released": "2026-01-16T01:42:24Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "almalinux 8",
      "fixedVersion": "7.61.1-30.el8_8.3",
      "fix": "ALSA-2023:4523",
      "url": "https://patchblox.com/security/fix/linux/alsa-2023-4523",
      "released": "2023-08-08T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "almalinux 9",
      "fixedVersion": "7.76.1-23.el9_2.2",
      "fix": "ALSA-2023:4354",
      "url": "https://patchblox.com/security/fix/linux/alsa-2023-4354",
      "released": "2023-08-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "amzn 2023",
      "fixedVersion": "8.0.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2023-270",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-270",
      "released": "2023-07-19T21:24:00Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "ol 8",
      "fixedVersion": "0:7.61.1-30.el8_8.3",
      "fix": "ELSA-2023-4523",
      "url": "https://patchblox.com/security/fix/linux/elsa-2023-4523",
      "released": "2023-08-10T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "ol 9",
      "fixedVersion": "0:7.76.1-23.el9_2.2",
      "fix": "ELSA-2023-4354",
      "url": "https://patchblox.com/security/fix/linux/elsa-2023-4354",
      "released": "2023-08-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "rocky 8",
      "fixedVersion": "0:7.61.1-30.el8_8.3",
      "fix": "RLSA-2023:4523",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2023-4523",
      "released": "2023-10-06T23:10:01Z"
    },
    {
      "platform": "linux",
      "product": "curl-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "8.0.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2023-270",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-270",
      "released": "2023-07-19T21:24:00Z"
    },
    {
      "platform": "linux",
      "product": "curl-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "8.0.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2023-270",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-270",
      "released": "2023-07-19T21:24:00Z"
    },
    {
      "platform": "linux",
      "product": "curl-minimal",
      "release": "RHEL 9",
      "fixedVersion": "0:7.76.1-23.el9_2.2",
      "fix": "RHSA-2023:4354",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2023-4354",
      "released": "2023-08-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "curl-minimal",
      "release": "almalinux 9",
      "fixedVersion": "7.76.1-23.el9_2.2",
      "fix": "ALSA-2023:4354",
      "url": "https://patchblox.com/security/fix/linux/alsa-2023-4354",
      "released": "2023-08-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "curl-minimal",
      "release": "amzn 2023",
      "fixedVersion": "8.0.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2023-270",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-270",
      "released": "2023-07-19T21:24:00Z"
    },
    {
      "platform": "linux",
      "product": "curl-minimal",
      "release": "ol 9",
      "fixedVersion": "0:7.76.1-23.el9_2.2",
      "fix": "ELSA-2023-4354",
      "url": "https://patchblox.com/security/fix/linux/elsa-2023-4354",
      "released": "2023-08-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "curl-minimal-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "8.0.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2023-270",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-270",
      "released": "2023-07-19T21:24:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl",
      "release": "RHEL 8",
      "fixedVersion": "0:7.61.1-30.el8_8.3",
      "fix": "RHSA-2023:4523",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2023-4523",
      "released": "2023-08-08T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl",
      "release": "RHEL 9",
      "fixedVersion": "0:7.76.1-23.el9_2.2",
      "fix": "RHSA-2023:4354",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2023-4354",
      "released": "2023-08-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl",
      "release": "almalinux 8",
      "fixedVersion": "7.61.1-30.el8_8.3",
      "fix": "ALSA-2023:4523",
      "url": "https://patchblox.com/security/fix/linux/alsa-2023-4523",
      "released": "2023-08-08T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl",
      "release": "almalinux 9",
      "fixedVersion": "7.76.1-23.el9_2.2",
      "fix": "ALSA-2023:4354",
      "url": "https://patchblox.com/security/fix/linux/alsa-2023-4354",
      "released": "2023-08-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl",
      "release": "amzn 2023",
      "fixedVersion": "8.0.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2023-270",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-270",
      "released": "2023-07-19T21:24:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl",
      "release": "ol 8",
      "fixedVersion": "0:7.61.1-30.el8_8.3",
      "fix": "ELSA-2023-4523",
      "url": "https://patchblox.com/security/fix/linux/elsa-2023-4523",
      "released": "2023-08-10T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl",
      "release": "ol 9",
      "fixedVersion": "0:7.76.1-23.el9_2.2",
      "fix": "ELSA-2023-4354",
      "url": "https://patchblox.com/security/fix/linux/elsa-2023-4354",
      "released": "2023-08-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "8.0.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2023-270",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-270",
      "released": "2023-07-19T21:24:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:7.61.1-30.el8_8.3",
      "fix": "RHSA-2023:4523",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2023-4523",
      "released": "2023-08-08T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl-devel",
      "release": "RHEL 9",
      "fixedVersion": "0:7.76.1-23.el9_2.2",
      "fix": "RHSA-2023:4354",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2023-4354",
      "released": "2023-08-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl-devel",
      "release": "almalinux 8",
      "fixedVersion": "7.61.1-30.el8_8.3",
      "fix": "ALSA-2023:4523",
      "url": "https://patchblox.com/security/fix/linux/alsa-2023-4523",
      "released": "2023-08-08T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl-devel",
      "release": "almalinux 9",
      "fixedVersion": "7.76.1-23.el9_2.2",
      "fix": "ALSA-2023:4354",
      "url": "https://patchblox.com/security/fix/linux/alsa-2023-4354",
      "released": "2023-08-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl-devel",
      "release": "amzn 2023",
      "fixedVersion": "8.0.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2023-270",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-270",
      "released": "2023-07-19T21:24:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl-devel",
      "release": "ol 8",
      "fixedVersion": "0:7.61.1-30.el8_8.3",
      "fix": "ELSA-2023-4523",
      "url": "https://patchblox.com/security/fix/linux/elsa-2023-4523",
      "released": "2023-08-10T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl-devel",
      "release": "ol 9",
      "fixedVersion": "0:7.76.1-23.el9_2.2",
      "fix": "ELSA-2023-4354",
      "url": "https://patchblox.com/security/fix/linux/elsa-2023-4354",
      "released": "2023-08-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl-minimal",
      "release": "RHEL 8",
      "fixedVersion": "0:7.61.1-30.el8_8.3",
      "fix": "RHSA-2023:4523",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2023-4523",
      "released": "2023-08-08T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl-minimal",
      "release": "RHEL 9",
      "fixedVersion": "0:7.76.1-23.el9_2.2",
      "fix": "RHSA-2023:4354",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2023-4354",
      "released": "2023-08-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl-minimal",
      "release": "almalinux 8",
      "fixedVersion": "7.61.1-30.el8_8.3",
      "fix": "ALSA-2023:4523",
      "url": "https://patchblox.com/security/fix/linux/alsa-2023-4523",
      "released": "2023-08-08T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl-minimal",
      "release": "almalinux 9",
      "fixedVersion": "7.76.1-23.el9_2.2",
      "fix": "ALSA-2023:4354",
      "url": "https://patchblox.com/security/fix/linux/alsa-2023-4354",
      "released": "2023-08-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl-minimal",
      "release": "amzn 2023",
      "fixedVersion": "8.0.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2023-270",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-270",
      "released": "2023-07-19T21:24:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl-minimal",
      "release": "ol 8",
      "fixedVersion": "0:7.61.1-30.el8_8.3",
      "fix": "ELSA-2023-4523",
      "url": "https://patchblox.com/security/fix/linux/elsa-2023-4523",
      "released": "2023-08-10T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl-minimal",
      "release": "ol 9",
      "fixedVersion": "0:7.76.1-23.el9_2.2",
      "fix": "ELSA-2023-4354",
      "url": "https://patchblox.com/security/fix/linux/elsa-2023-4354",
      "released": "2023-08-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl-minimal-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "8.0.1-1.amzn2023.0.1",
      "fix": "ALAS2023-2023-270",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-270",
      "released": "2023-07-19T21:24:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl3-gnutls",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "7.58.0-2ubuntu3.24\u002Besm1",
      "fix": "libcurl3-gnutls 7.58.0-2ubuntu3.24\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libcurl3-gnutls-7.58.0-2ubuntu3.24-esm1",
      "released": "2023-05-16T23:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl3-gnutls",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "7.68.0-1ubuntu2.19",
      "fix": "libcurl3-gnutls 7.68.0-1ubuntu2.19",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libcurl3-gnutls-7.68.0-1ubuntu2.19",
      "released": "2023-05-16T23:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl3-gnutls",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "7.81.0-1ubuntu1.11",
      "fix": "libcurl3-gnutls 7.81.0-1ubuntu1.11",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libcurl3-gnutls-7.81.0-1ubuntu1.11",
      "released": "2023-05-16T23:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl3-nss",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "7.58.0-2ubuntu3.24\u002Besm1",
      "fix": "libcurl3-nss 7.58.0-2ubuntu3.24\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libcurl3-nss-7.58.0-2ubuntu3.24-esm1",
      "released": "2023-05-16T23:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl3-nss",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "7.68.0-1ubuntu2.19",
      "fix": "libcurl3-nss 7.68.0-1ubuntu2.19",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libcurl3-nss-7.68.0-1ubuntu2.19",
      "released": "2023-05-16T23:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl3-nss",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "7.81.0-1ubuntu1.11",
      "fix": "libcurl3-nss 7.81.0-1ubuntu1.11",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libcurl3-nss-7.81.0-1ubuntu1.11",
      "released": "2023-05-16T23:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl3t64-gnutls",
      "release": "Ubuntu 24.10 (oracular)",
      "fixedVersion": "7.88.1-10ubuntu1",
      "fix": "libcurl3t64-gnutls 7.88.1-10ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-oracular-libcurl3t64-gnutls-7.88.1-10ubuntu1",
      "released": "2026-01-16T01:42:23Z"
    },
    {
      "platform": "linux",
      "product": "libcurl3t64-gnutls",
      "release": "Ubuntu 25.04 (plucky)",
      "fixedVersion": "7.88.1-10ubuntu1",
      "fix": "libcurl3t64-gnutls 7.88.1-10ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-plucky-libcurl3t64-gnutls-7.88.1-10ubuntu1",
      "released": "2026-01-16T01:42:24Z"
    },
    {
      "platform": "linux",
      "product": "libcurl4",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "7.58.0-2ubuntu3.24\u002Besm1",
      "fix": "libcurl4 7.58.0-2ubuntu3.24\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libcurl4-7.58.0-2ubuntu3.24-esm1",
      "released": "2023-05-16T23:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl4",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "7.68.0-1ubuntu2.19",
      "fix": "libcurl4 7.68.0-1ubuntu2.19",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libcurl4-7.68.0-1ubuntu2.19",
      "released": "2023-05-16T23:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl4",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "7.81.0-1ubuntu1.11",
      "fix": "libcurl4 7.81.0-1ubuntu1.11",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libcurl4-7.81.0-1ubuntu1.11",
      "released": "2023-05-16T23:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl4t64",
      "release": "Ubuntu 24.10 (oracular)",
      "fixedVersion": "7.88.1-10ubuntu1",
      "fix": "libcurl4t64 7.88.1-10ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-oracular-libcurl4t64-7.88.1-10ubuntu1",
      "released": "2026-01-16T01:42:23Z"
    },
    {
      "platform": "linux",
      "product": "libcurl4t64",
      "release": "Ubuntu 25.04 (plucky)",
      "fixedVersion": "7.88.1-10ubuntu1",
      "fix": "libcurl4t64 7.88.1-10ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-plucky-libcurl4t64-7.88.1-10ubuntu1",
      "released": "2026-01-16T01:42:24Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-10T01:44:33Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}